(57) An aromatic polyester superior in heat resistance and melt-moldability is obtained
by carrying out the polycondensation reaction with
Component A consisting of at least one compound having the formula,
wherein R₁ is hydrogen, formyl, acetyl, propionyl or benzoyl, and R₂ is hydrogen,
a C₁-C₆ alkyl or a C₆-C₁₈ aryl,
or a mixture containing not less than 50% by mole of said compound,
Component B consisting of at least one compound having any one of the formulas,
wherein R₃ is hydroxyl, a C₁-C₆ alkyloxy, a C₆-C₁₈ aryloxy or halogen,
or a mixture containing not less than 50% by mole of said compound, and
Component C consisting of at least one compound having the formula,
R₄O-A₁-OR₄
wherein A₁ is a divalent aromatic residue, and R₄ is hydrogen, acetyl, propionyl or
benzoyl
in a reaction vessel at a temperature of 270°C to 380°C until the flow temperature
of the produced aromatic polyester reaches a temperature of 240°C or higher.
The aromatic polyester obtained by the process of the present invention can be used
molded into various forms such as fiber, film, etc. In addition, compositions comprising
this aromatic polyester and fillers can be used in machine parts, electric and electronic
parts and automobile parts because of their excellent mechanical properties, electric
properties, chemical resistance and oil resistance.
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